Magnetic Field Dependence of Penetration Depth in Kinetic Energy Driven Cuprate Superconductors

Huang, Zheyu; Zhao, Huaisong; Lan, Yu; Feng, Shiping

doi:10.1007/s10948-012-1541-1

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Spin Fluctuations and Pairing1

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2012

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“…Huang et al shows the change in the penetration depth as a function of temperature and magnetic field. The calculations have been done starting from the t-J model on a square lattice, taking into account the 2D geometry of cuprate superconductors [101].…”

Section: Spin Fluctuations and Pairingmentioning

confidence: 99%

Superstripes and Complexity in High-Temperature Superconductors

Bianconi

Poccia

2012

J Supercond Nov Magn

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While for many years the lattice, electronic and magnetic complexity of hightemperature superconductors (HTS) has been considered responsible for hindering the search of the mechanism of HTS now the complexity of HTS is proposed to be essential for the quantum mechanism raising the superconducting critical temperature. The complexity is shown by the lattice heterogeneous architecture: a) heterostructures at atomic limit; b) electronic heterogeneity: multiple components in the normal phase; c) superconducting heterogeneity: multiple superconducting gaps in different points of the real space and of the momentum space. The complex phase separation forms an unconventional granular superconductor in a landscape of nanoscale superconducting striped droplets which is called the "superstripes" scenario. The interplay and competition between magnetic orbital charge and lattice fluctuations seems to be essential for the quantum mechanism that suppresses thermal decoherence effects at an optimum inhomogeneity.

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Section: Spin Fluctuations and Pairingmentioning

confidence: 99%